M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 149
M30622MA-XXXFP
Manufacturer Part Number
M30622MA-XXXFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.M30622MA-XXXFP.pdf
(621 pages)
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Clock asynchronous serial I/O (UART) mode
134
Figure 1.19.17. Typical transmit timings in UART mode(UART2)
• Example of transmit timing when transfer data is 8 bits long (parity enabled, one stop bit)
Transfer clock
Transmit enable
bit(TE)
Transmit buffer
empty flag(TI)
TxD
Transmit register
empty flag (TXEPT)
Transmit interrupt
request bit (IR)
Note: The transmit is started with overflow timing of BRG after having written in a value at the transmit buffer in the above timing.
2
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
Shown in ( ) are bit symbols.
The above timing applies to the following settings :
• Parity is enabled.
• One stop bit.
• Transmit interrupt cause select bit = “1”.
Start
ST
bit
D
Data is set in UART2 transmit buffer register
0
D
1
Tc
D
2
D
3
D
4
D
5
D
6
D
Parity
7
bit
P
SP
Stop
bit
Transferred from UART2 transmit buffer register to UARTi transmit register
Cleared to “0” when interrupt request is accepted, or cleared by software
Tc = 16 (n + 1) / fi
fi : frequency of BRG2 count source (f
n : value set to BRG2
ST
Note
D
0
D
1
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D
2
D
3
D
4
D
5
D
6
D
7
P
1
, f
SP
8
Mitsubishi microcomputers
, f
M16C / 62 Group
32
)
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